Still having pain in tooth after having small amount of decay taken out, the pain is not as bad as before but still sore. do i need root canal?

Maybe: If the pain is constant and sensitive to tapping it is probably time for a root canal. If the pain comes and goes and appears to be improving i would wait and see.

Usually tincture of: How long has the tooth been hurting? If a short period of time, it could be 'reversible pulpitis' where the nerve is inflamed. Meds such as Motrin can help. If it has been a long time with the pain go to your dentist and he will likely check for a crack in the tooth. Years ago we had the 'dorito test' eating a dorito on that tooth without pain: it wasn't cracked. Now are more sophisticated tests.

Wait a few days: Your pulp is inflammed from having all the work done. Once the pulp (nerve part) calms down your symptoms may disappear. If the pain persisted for more than one month then have it checked out by your dentist. Meanwhile, iburpofen 600mg 3-4 times a day may be your best friend (or whatever dosage your dentist gave you).

It's not uncommon: For a tooth to be sensitive following a filling, even sometimes for a small cavity. Everyone has different pain thresholds and teeth may react differently even in the same individual. Getting a cavity replaced with a filling is actually a microsurgical procedure and the nerve of the tooth needs time to recover. If it worsens or doesn't get better, see your dentist. Rct is unlikely!